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    <title>Document</title>
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    <script>
      function Person() {
        this.name = '李四';
      }

      Person.prototype.say = function () {
        console.log('hello');
      };

      var person1 = new Person();
      console.log(person1.name);
      person1.say();
    </script>
  </body>
</html>
